When I look at it is a 3D printable model, my eye is immediately drawn to the interior overhangs required in the base, and the overhangs for the squished diamonds towards the top. Overhangs more than ~45 degrees will tend to droop, and more than ~60 degrees will probably give you unacceptable bottom surfaces without support. Of course, in this case, any issues don't appear to have come much into play, but it's something to keep in mind when modeling for printing.